How to do Linux Tuning and Performance? any one has done for xen kernel ?
closed as not constructive by Lucas Kauffman, Ward, jscott, voretaq7♦ Jul 28 '12 at 0:52
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You first have to figure out where your bottleneck is, i.e., disk IO. Then figure out your usage patters and see if there is anything that might improve your situation. The sysstat package which has sar and iostat is a good place to start to collect the information.
Chances are, the defaults are probably best :-)
If you just want a throwaway link this article on kernel and driver performance tweaks will sate your appetite.